Britain's true ruler? Larry, the Downing Street cat | AFP

There has been one figure of stability in the last 14 years of political turmoil in the UK -- Larry, the Downing Street cat and Chief Mouser to the Cabinet Office. The ageing tabby could be in line for his sixth prime minister after the UK votes in a general election on July 4, with opinion polls suggesting that he will oversee his first from the Labour Party.